An off-topic idea (not based on QCX) might be to convert a cheap (Baofeng) FM transceiver to CW. They can be had for less than $30 US. Could be as simple as a code practice oscillator input into the mic. Could be to modify the modulator to not deviate the frequency and supply a local IF level oscillator to get the tone.
Just an out of the box (and again OFF-TOPIC) thought.
Please excuse the message, I just could not help myself.